Revision GSM

What is the primary purpose of the Atterberg limits test in soil classification?

• To determine soil permeability

• To measure soil plasticity characteristics

• To evaluate soil bearing capacity

• To assess soil grain size distribution

In the Unified Soil Classification System (USCS), what does CH represent?

• Clayey sand

• Poorly graded gravel

• High plasticity clay

• Well-graded sand

Which rock type is formed by the cooling and crystallization of magma or lava?

• Metamorphic rock

• Sedimentary rock

• Igneous rock

• Chemical rock

The liquid limit of a soil is 45% and plastic limit is 25%. What is the plasticity index?

• 20%

• 70%

• 15%

• 35%

Which weathering process involves the breakdown of rocks through chemical reactions?

• Frost wedging

• Chemical decomposition

• Physical abrasion

• Thermal expansion

Which mineral is most commonly associated with high plasticity in clay soils?

• Kaolinite

• Quartz

• Montmorillonite

• Feldspar

What type of weathering occurs when salt crystals grow in rock cracks?

• Biological weathering

• Chemical weathering

• Physical weathering

• Oxidation weathering

The shrinkage limit of a soil is defined as:

• The water content at which soil changes from solid to semi-solid state

• The water content at which soil changes from plastic to liquid state

• The minimum water content at which soil is fully saturated

• The water content at which further drying causes no volume change

Which rock type is most susceptible to chemical weathering?

• Quartzite

• Limestone

• Granite

• Sandstone